JPH093801A - Elastic bearing device for sleeper - Google Patents

Abstract

PURPOSE: To prevent gravel on a gravel ballast from biting into an elastic bearing box and hold an elastic beating function for sleepers for a long time by forming a load bearing hard rubber layer having a specified thickness on the top of a base plate of an elastic bearing box formed with hard rubber by one piece vulcanization with the base plate CONSTITUTION: An elastic bearing box main body, which comprises a base plate 1, both side plates 2 and an outer end plate 3, is molded by semi- vulcanization with a hard rubber material. Then, the hard rubber material which forms a hard rubber layer 6 is loaded on the top of the base plate 1 which is semi-vulcanized. The elastic bearing box main body and the hard rubber layer are vulcanization-molded in a mold, thereby molding an elastic bearing box 5. A sleeper 13 is inserted into the bearing box 5 and fixed with the elastic bearing box 5 by means of fixing nails 12. Therefore, the base plate 1 of the elastic bearing box 5 receives a load from above, which prevents gravel 10a of grave; ballast 10 from biting into the base plate 1 althrough it may be vertically bent slightly and protects the elastic bearing box 5 from damages. This construction makes it possible to extend a maintenance cycle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic bearing device for a wooden or concrete sleeper laid on a gravel floor of a railway.

[0002]

2. Description of the Related Art A sleeper made of wood or concrete laid on a gravel road floor absorbs vibration received by the sleeper due to the elasticity of the gravel road floor. In addition, both ends of the sleepers are supported by elastic bearing boxes in order to further reduce the impact transmitted to the gravel bed, prevent gravel pebbles (that is, decrease in elasticity) and dust generation, and extend the maintenance cycle. Often.

As shown in FIGS. 16 and 17, a conventional elastic bearing box has a bottom plate 21, both side plates 22 and outer end plates 23 standing upright from the edge of the bottom plate 21, and is integrally molded of soft rubber. ing. The end of the sleeper 24 to which the rail 20 is fixed by the fixing device 28 is supported by this elastic bearing box 25, and this elastic bearing box 25 is embedded in the gravel floor 10. Further, the sleeper 24 and the elastic bearing box 25 are integrally fixed by adhesion or by an anchor bolt (not shown) provided in the lower part of the sleeper.

As shown in FIG. 1, the sleeper elastic bearing structure using the elastic bearing box 25 made of soft rubber as described above is shown in FIG.
As shown in 6, there is a problem that the gravel 10a of the gravel roadbed 10 bites into the soft rubber of the elastic support box 25 due to long-term use, the elastic support box 25 is damaged, and the original elastic support function is lost. If the elastic bearing box 25 loses its elastic bearing function, the gravel 10a of the gravel road bed 10 becomes finer due to the vibration of the sleeper 24, and dust is more prominent, and it may be replaced with a new elastic bearing box 25. Therefore, maintenance work is required in a relatively short cycle, and there is a problem that this maintenance work takes time and effort.

For maintenance work when the elastic bearing function of the gravel roadbed 10 is deteriorated, a Kodoki tamping device disclosed in Japanese Patent Laid-Open No. 7-119105 is used to push back the ballast having a gap and to perform sleeper operation. It is a work of repacking the ballast moved to the side below the sleeper 24 again.

[0006]

As described above, in the conventional elastic bearing box 25 made of soft rubber, since the soft rubber is rich in elasticity, the elastic bearing box 25 receives vibrations from the sleepers 24. By absorbing the vibration, the vibration is not transmitted to the gravel road bed 10, and it is possible to suppress the generation of fine stone (decrease in elasticity) and dust of the gravel 10a. On the other hand, however, since the elastic bearing box 25 is made of soft rubber alone, as shown in FIG. 16, the gravel 10a of the gravel floor 10 easily intrudes into the soft rubber due to long-term use, and the elastic bearing box 25 is damaged. Along with this, the original elastic bearing function was lost, and a new elastic bearing box 2
Maintenance work including replacement with No. 5 is required in a relatively short cycle, and the maintenance work is generally performed at night, which is troublesome and time-consuming.

An object of the present invention is to provide a novel elastic bearing device which improves the drawbacks of the conventional sleeper elastic bearing device and extends the maintenance cycle by improving the elastic bearing box.

[0008]

In order to achieve the above-mentioned object, an elastic bearing for a sleeper according to the present invention is provided with a bottom plate 1.
An upper surface of the bottom plate 1 of the elastic bearing box body 5a made of hard rubber, having both side plates 2 standing up from the side edges of the bottom plate 1 and outer end plates 3 standing up from the outer edge of the bottom plate 1. And an elastic bearing box 5 formed by integrally vulcanizing the load bearing soft rubber layer 6 with a predetermined thickness, and supporting the sleeper with the load bearing soft rubber layer 6, This sleeper is characterized in that it is fixed to the elastic bearing box 5 using a fixing means.

The sleeper elastic bearing device of the present invention is
An elastic bearing box body 5a formed of hard or non-hard rubber, having a bottom plate 1, both side plates 2 standing up from side edges of the bottom plate 1, and outer end plates 3 standing upright from outer edges of the bottom plate 1. A plate-shaped reinforcing hard material 9 is embedded in the bottom plate 1, and an elastic bearing formed by integrally vulcanizing the load bearing soft rubber layer 6 with a predetermined thickness on the upper surface of the bottom plate 1. A box 5 is provided, the sleeper is supported by the soft rubber layer 6, and the sleeper is fixed to the elastic bearing box 5 using a fixing means.

Ribs 11 for preventing gravel collapse may be provided on the lower surface of the bottom plate 1.

The fixing means is either one of adhesion between the soft rubber layer 6 and the side plates 2, the outer end plate 3 and the sleepers, or a nailing between the side plates 2 and the sleepers, or
It is good to have both.

The fixing means is composed of a guide hole 7 provided on both side plates 2 and a sleeper movement restricting shaft 8 which is loosely fitted in the guide hole 7 and has its tip inserted and fixed to the side surface of the sleeper. You may.

The sleeper is a concrete sleeper 13
a, and the sleeper movement restricting shaft 8 is attached to the bolt 1
8 and the bolt 18 is concrete sleeper 13a.
It may be screwed into the female screw 15 of the embedding plug 14 provided on the side surface of the.

The sleeper is a wooden sleeper 13, and the sleeper movement restricting shaft 8 is a nail or a screw,
The nail or screw may be driven or screwed into the side surface of the wooden sleeper 13.

[0015]

According to the present invention, since the sleeper is elastically supported by the load bearing soft rubber layer 6 in the elastic bearing box 25 in the gravel roadbed 10, vibration of the sleeper is caused by the soft rubber layer 6. Smoothly absorbed, and therefore the vibration of the elastic bearing box 5 is reduced, and the gravel 10a on the gravel bed 10 is reduced.
The formation of fine stones and dust can be suppressed. Moreover, the elastic bearing box 5
Since the bottom plate 1, the both side plates 2 and the outer end plate 3 which compose the above are made of hard rubber, or the plate-shaped hard reinforcing material 9 is embedded in the bottom plate 1, the bottom plate 1 has gravel 10a. The soft rubber layer 6 is protected from being eaten by the bottom plate 1, and the elastic support function of the elastic support box 5 for the sleepers is maintained for many years.

Further, by providing ribs 11 for preventing gravel collapse on the lower surface of the bottom plate 1, gravel collapse can be prevented and the cycle of maintenance work for repacking the gravel 10a under the sleeper using a tamping device can be further extended. it can.

[0017]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 4 show the first embodiment, in which the sleepers are laid on the gravel roadbed 10, and both ends of the wooden sleepers 13 (only one end is shown in FIGS. 1 to 3)
Are supported by elastic bearing boxes 5 embedded in the gravel track 10.

The elastic support box 5 has a substantially rectangular shape when seen in a plan view, and has a bottom plate 1 and both side plates 2 standing upright from the side edges of the bottom plate 1.
And an elastic bearing box body 5a consisting of an outer end plate 3 standing upright from the outer edge of the bottom plate 1, and these bottom plate 1 and both side plates 2
And the elastic support box body 5a including the outer end plate 3 are integrally formed of hard rubber (for example, Neoplus).

Further, a soft rubber layer 6 for load bearing having a predetermined thickness is integrally provided on the upper surface of the bottom plate 1, and the sleeper 13 is attached to the elastic bearing box 5 through the upper surface opening 16 and the inner end opening 17. It is inserted and supported by the load bearing soft rubber layer 6.

In order to integrally form the load bearing soft rubber layer 6 with the bottom plate 1, first, the elastic bearing box body 5a comprising the bottom plate 1, both side plates 2 and the outer end plate 3 is made of a hard rubber material. After semi-vulcanization molding, a soft rubber material for forming the soft rubber layer 6 is placed on the upper surface of the semi-vulcanized bottom plate 1, and then the elastic support box body 5a and the soft rubber material are added in a mold. By vulcanization molding, an elastic bearing box 5 in which the bottom plate 1 and the load bearing soft rubber layer 6 are integrally vulcanized and molded is molded.

When the elastic bearing box 5 is embedded in the gravel roadbed 10, the load bearing soft rubber layer 6 is rich in elasticity, so that the vibration of the sleeper 13 is smoothly caused by the compression deformation of the soft rubber layer 6. The vibration of the elastic support box 5 itself is absorbed, so that the vibration of the sleeper 13 is suppressed.
0, the gravel is prevented from becoming fine and the gravel gap is maintained, the gravel bed 10 has a long elastic bearing function, and dust generation is also suppressed. Moreover, since the bottom plate 1 of the elastic support box 5 is made of hard rubber, the bottom plate 1 may be slightly bent up and down by receiving a load from above, but the gravel 10a does not bite into the bottom plate 1. The elastic bearing box 5 is not damaged,
The soft rubber layer 6 is also not damaged.

When the sleeper is the wooden sleeper 13,
As a means for fixing the wooden sleeper 13 to the elastic support box 5, there is a fixing means by nailing using a fixing nail 12 or a fixing means by adhesion using an adhesive 19, as shown in FIG. In the case of using nailing, the both are fixed by penetrating the nail holes 30 of the both side plates 2 of the elastic support box 5 and driving the fixing nail 12 into the side surface of the wooden sleeper 13. In the case of adhesion, the inner surfaces of both side plates 2 of the elastic support box 5 and the soft rubber layer 6 for load support and the wooden sleepers 13a are adhered with an adhesive 19 to fix them.

When the wooden sleeper 13 is fixed to the elastic support box 5 by the nailing fixing means or the fixing means by adhesion, both side plates 2 are made of hard rubber when the sleeper 13 vibrates up and down. The side plates 2 are bent and deformed as the sleeper 13 moves up and down. In other words, the side plates 2 are deformed following the movement of the sleeper 13, so that even if the sleeper 13 is fixed to the elastic support box 5, the elastic support box 5 is damaged by the vertical movement of the sleeper 13. There is no. The nail fixing means and the adhesive fixing means can be used together.

Sleepers are concrete sleepers 13a
In the case of, the nail fixing means or the adhesive fixing means cannot be used. In this case, the fixing means shown in FIGS. 5 to 7 may be used as the second embodiment. First, an embedding plug (insert) 14 having an internal thread 15 is provided on both side surfaces of an end of a concrete sleeper 13a. On the other hand, at the position facing the embedding plug 14, the raised portions 2a are provided on both side plates of the elastic support box 5, and the movement of the sleepers is regulated in the guide hole 7 formed in the raised portion 2a and having a vertically long slot. A bolt 18 as a specific example of the shaft 8 is loosely fitted, and the threaded portion of the bolt 18 is screwed into the female screw 15 of the embedding plug 14. Bolt 1
A vertical gap between the guide hole 7 and the guide hole 8 is provided substantially the same as the compression margin of the load bearing soft rubber layer 6.

With the above construction, when the concrete sleeper 13a supported by the load-bearing soft rubber layer 6 is loaded from above, the bolt 18 is loosely fitted in the guide hole 7 so that the bolt In the range in which 18 can move in the vertical direction in the guide hole 7, the sleeper 13a moves up and down smoothly by the elasticity of the soft rubber layer 6, and the rail 20 fixed to the sleeper 13a via the fixing device 28 vibrates. Is absorbed. Moreover, the moving range of the sleeper 13a is restricted by the bolt 18 being loosely fitted in the guide hole 7,
There is no problem such that the sleeper 13a moves undesirably in the elastic support box 5 or escapes from the elastic support box 5.

Since both side plates 2 of the elastic support box 5 are made of hard rubber and can be deformed, the guide hole 7 and the bolt 18 are provided.
It is also possible to configure so that there is no gap between them. In this case, as in the case of the nail fixing means shown in FIG. 2, the bolt 1 is moved along with the vertical movement of the concrete sleeper 13a.
Both side plates 2 are bent and deformed via 8 and follow the movement of the sleeper 13a.

In the case of the wooden sleeper 13 as well, it can be fixed to the elastic bearing box 5 by using the fixing means by the guide hole 7 and the sleeper movement restricting shaft 8 shown in FIGS. 8 and 9 as the third embodiment. In the case of this wooden sleeper 13, a plug 12 in the concrete sleeper 13a of FIG. 6 and a nail 12 of a predetermined length in place of the bolt 18 are loosely fitted in the guide hole 7 and the sleeper is driven. Note that, instead of the nail 12, a screw (not shown) is loosely fitted in the guide hole 7 and then screwed into the side surface of the wooden sleeper 13, so that the wooden sleeper 13 is movably fixed to the elastic support box 5. You can also

According to the elastic bearing devices of the first to third embodiments, the load bearing soft rubber layer 6 in the elastic bearing box 5 smoothly absorbs the vibrations of the sleepers 13 and 13a so that the elastic bearing box 5 itself. Vibration is suppressed, and since the bottom plate 1 is made of hard rubber, it is not damaged by the gravel surface.

Next, FIGS. 10 and 11 show an elastic bearing device according to the fourth embodiment. In the fourth embodiment, a plate-shaped reinforcing hard material 9 is embedded inside the wall thickness of the bottom plate 1 of the elastic bearing box 5. As the reinforcing hard material 9, for example, a steel plate, a reinforced plastic plate or the like cut into a predetermined size may be used. Also, in this fourth embodiment, the elastic bearing box body 5
The bottom plate 1, which constitutes a, the side plates 2 and the outer end plate 3, are the first
The same hard rubber as in the embodiment may be used, or non-hard rubber may be used. The other structure is the same as that of the first embodiment.

According to the fourth embodiment, since the bottom plate 1 of the elastic bearing box 5 is reinforced by the reinforcing hard material 9 embedded therein, the elastic bearing box body 5a including the bottom plate 1 is formed of non-hard rubber. However, when the bottom plate 1 in contact with the gravel surface receives a load, the bottom plate 1 is not damaged by the gravel 10a,
Therefore, the load bearing soft rubber layer 6 on the upper surface of the bottom plate is not damaged.

12 to 15 show an elastic bearing device according to the fifth embodiment. In the first to fourth embodiments, the lower surface of the bottom plate 1 of the elastic bearing box 5 is a flat surface, but in the fifth embodiment, the ridge shoulders 1a are provided along the peripheral edge of the bottom plate 1 and the bottom plate 1 is provided. Ribs for preventing gravel collapse on the lower surface of 1
Is molded. The gravel collapse preventing rib 11 may have any depth and bottom shape, but in the embodiment, the rib 11 is used.
Are formed in a grid pattern. The other structure is the same as that of the first embodiment.

Therefore, according to the fifth embodiment, when the elastic bearing box 5 is embedded in the gravel bed 10, the gravel 10a is surrounded by the ridge shoulder 1a and the gravel collapse preventing rib 11 as shown in FIG. By entering the area, the gravel 10a does not move, the gravel gap is clogged, and the gravel collapse that moves from the lower side of the elastic support box 5 to both sides is reduced.
It is possible to further extend the maintenance work cycle in which 0a is pushed back to the lower part of the elastic bearing box 5a while expanding the gravel gap.

[0033]

According to the present invention, when the elastic bearing box 5 for supporting the sleeper is embedded in the gravel road bed 10, the sleeper is elastically supported by the load bearing soft rubber layer 6 in the elastic bearing box 5. Since the sleeper vibration is smoothly absorbed by the soft rubber layer 6, the vibration of the elastic support box 5 is reduced,
The sleeper vibrations are less likely to be transmitted to the gravel road bed 10, and therefore, it is possible to prevent the gravel from becoming fine (that is, the elasticity is reduced) and the generation of dust on the gravel road bed 10 and to extend the maintenance work cycle. . Moreover, the elastic bearing box 5
Since the bottom plate 1, the both side plates 2 and the outer end plate 3 constituting the bottom plate 1 are made of hard rubber, or the plate-like reinforcing hard material 9 is embedded in the bottom plate 1, gravel may be embedded in the bottom plate 1. , The soft rubber layer 6 is not damaged by the bottom plate 1, and the elastic support box 5
The elastic bearing function for the sleepers has the effect of being retained for many years.

Further, by providing ribs 11 for preventing gravel collapse on the bottom surface of the bottom plate 1, gravel collapse is prevented, and the gravel gap is expanded by using a tamping device, and the gravel 1 is provided under the sleepers.
There is an effect that the cycle of maintenance work for repacking 0a can be further extended.

[Brief description of drawings]

FIG. 1 is a side view of an elastic support device for sleepers according to a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a partially cutaway plan view of FIG. 1. FIG.

FIG. 4 is a perspective view of an elastic bearing box.

FIG. 5 is a side view showing a fixing means for a concrete sleeper to an elastic bearing box as a second embodiment.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a perspective view of an elastic bearing box.

FIG. 8 is a side view showing a fixing means for a wooden sleeper to an elastic bearing box as a third embodiment.

FIG. 9 is a sectional view taken along the line CC of FIG. 8;

FIG. 10 is a side view of an elastic support device for sleepers according to a fourth embodiment.

11 is a cross-sectional view taken along the line DD of FIG.

FIG. 12 is a side view of an elastic support device for sleepers according to a fifth embodiment.

FIG. 13 is a sectional view taken along line EE of FIG. 12;

FIG. 14 is a sectional view of a sleeper and an elastic bearing box.

FIG. 15 is a bottom view of FIG.

FIG. 16 is a vertical sectional side view of a conventional sleeper elastic bearing device.

FIG. 17 is a sectional view taken along line FF of FIG. 16;

[Explanation of symbols]

 1 Bottom Plate 2 Both Sides Plate 3 Outer End Plate 5 Elastic Bearing Box 6 Soft Rubber Layer for Load Bearing 7 Guide Hole 8 Sleeper Movement Restriction Axis 9 Hardening Material for Reinforcement 10 Gravel Roadbed 10a Gravel 11 Rib for Preventing Gravel Collapse 12 Fixed Nail 13 Wooden Sleepers 13a Concrete sleepers 14 Embedded plugs 15 Female screws 16 Top openings 17 Inner end openings 18 Bolts 19 Adhesives 20 Rails 21 Bottom plates 22 Both side plates 23 Outer end plates 24 Sleepers 25 Elastic bearing boxes 28 Fixing devices 30 Nails Hole

Claims (7)

[Claims] 1. An elastic bearing box body made of hard rubber, having a bottom plate 1, both side plates 2 standing up from side edges of the bottom plate 1, and outer end plates 3 standing upright from outer edges of the bottom plate 1. An elastic bearing box 5 formed by integrally vulcanizing the load bearing soft rubber layer 6 having a predetermined thickness on the upper surface of the bottom plate 1 of 5a.
An elastic bearing device for sleepers, characterized in that the sleeper is supported by the soft rubber layer 6 for load bearing, and the sleepers are fixed to the elastic support box 5 using a fixing means. 2. A bottom plate (1), both side plates (2) standing up from the side edges of the bottom plate (1), and an outer end plate (3) standing up from the outer edge of the bottom plate (1), made of hard or non-hard rubber. A plate-shaped reinforcing hard material 9 is embedded in the bottom plate 1 of the elastic bearing box body 5a, and a load bearing soft rubber layer 6 having a predetermined thickness is integrally vulcanized with the bottom plate 1 on the upper surface of the bottom plate 1. An elastic bearing box 5 is provided, which has the formed elastic bearing box 5, supports the sleeper with the soft rubber layer 6, and uses the fixing means to secure the sleeper.
An elastic support device for sleepers characterized by being fixed to. 3. The sleeper elastic bearing device according to claim 1, wherein ribs 11 for preventing gravel collapse are provided on the lower surface of the bottom plate 1. 4. The fixing means is configured to bond the soft rubber layer 6 and the side plates 2, the outer end plate 3 and the wooden sleeper 13 or to fix the nails between the side plates 2 and the sleeper 13. The sleeper elastic bearing device according to any one of claims 1 to 3, which is either one or both. 5. A guide hole 7 in which the fixing means is provided in both side plates 2, and a sleeper movement restricting shaft 8 which is loosely fitted in the guide hole 7 and has its tip inserted into and fixed to the side surface of the sleeper.
The sleeper elastic bearing device according to any one of claims 1 to 3, which is configured by: 6. The sleeper is a concrete sleeper 1.
3a, the sleeper movement restricting shaft 8 is a bolt 18, and the bolt 18 is a concrete sleeper 1
The elastic support device for sleepers according to claim 5, wherein the elastic support device for sleepers is screwed into an internal thread 15 of an embedding plug 14 provided on a side surface of 3a. 7. The sleeper is a wooden sleeper 13, the sleeper movement restricting shaft 8 is a nail or a screw, and the nail or screw is driven or screwed into the side surface of the wooden sleeper 13. Item 6. The elastic support device for sleepers according to Item 5.